小型纺丝螺杆结构尺寸的优化分析  

Optimization analysis on critical dimension of a small spinning screw

作　　者：汪春[1,2] 甘佳佳[1,2] 李思平[1,2] 张巧峰[1,2] 傅超[1,2] 甘学辉[1,2] 

机构地区：[1]东华大学纺织装备教育部工程研究中心,上海201620 [2]纺织面料教育部重点实验室,上海201620

出　　处：《合成纤维工业》2016年第2期56-59,共4页China Synthetic Fiber Industry

基　　金：中央高校基本科研业务费支持(15D110318;15D110322)

摘　　要：介绍了化纤纺丝螺杆的工作原理;针对25 mm小型螺杆纺丝过程中易堵料的现象,根据螺杆特性及固相分布曲线,对聚对苯二甲酸乙二醇酯(PET)和聚丙烯(PP)纺丝用螺杆的结构尺寸进行优化。结果表明:高熔点的物料应当适量增加螺杆加料段的有效长度来充分预热物料,防止发生堵塞现象;计量段螺槽深度(H3)影响螺杆的挤出量,但H3越大,螺杆的挤出量受压力波动的影响就较大,应根据螺杆特性曲线确定合理的H3;对于PET,H3为1.25 mm较适宜,在最大转速为40 r/min时,螺杆最大挤出量(Q)为3.133kg/h,而对于PP,H3为1.0 mm较适宜,在最大转速为85 r/min时,Q为3.9 kg/h,满足实验样机的要求。The working principle of spinning screw for chemical fiber was introduced. The critical dimension of spinning screw for polyethylene terephthalate（ PET） and polypropylene（ PP） spinning process was optimized according to the characteristics and solid-phase distribution curves of screw in order to solve the blockage of the small spinning screw with the diameter of 25 mm during the spinning process. The results showed that for the feedstocks with high melting point,the effective length of the feeding section of the screw should be increased in order to sufficiently heat the feedstocks and avoid the blockage; the screw groove depth（ H3） of measuring section affected the extrusion of the screw,which was affected by the pressure fluctuation more profoundly at higher H3,therefore,H3 should be properly determined according to the characteristic curves of the screw; for PET,H3 should properly be 1. 25 mm and the maximum extrusion（ Q） of the screw was 3. 133 kg / h at the maximum rotation rate of 40 r / min,and for PP,H3 should properly be 1. 0 mm and Q was 3. 9 kg / h at the maximum rotation rate of 85 r / min,satisfying the requirements of an experimental prototype.

关 键 词：聚对苯二甲酸乙二醇酯 聚丙烯 纺丝螺杆 加料段 压缩段 计量段 螺槽深度 

分 类 号：TQ340.64[化学工程—化纤工业]